Anomalous glacial deposits in the Colorado Front Range area, Colorado

Abstract

Reinvestigation of reported glacial deposits in the Colorado Front Range area, in locations above or exterior to those commonly classed as glaciated, has resulted in a doubling of the number of known deposits, and the finding of a rough gradation from glacial, near the Arapaho Massif; through reworked glacial, at distances of six or seven miles; to glacio‐fluviatile and fluviatile at greater distances. From this evidence, one or more early Pleistocene glaciations are postulated, the parent ice body being of the ice‐cap type, resting upon a gently rolling terrain of which only the so‐called peneplain surfaces now remain. A similar large ice cap in the Laramie‐Poudre area is suggested by scattered evidence between those river s and the Laramie‐Fort Collins highway.